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  4. A Comparison of Two Models for the Separation of Direct and Diffuse Irradiance in Plane of Array
 
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2019
Conference Paper
Titel

A Comparison of Two Models for the Separation of Direct and Diffuse Irradiance in Plane of Array

Abstract
For advanced automated operational monitoring of Photovoltaic (PV) systems, e.g. in order to distinguish losses due to self-shading from malfunctions, direct and diffuse irradiance at the module plane (plane of array, POA) are required separately. However, in practice, usually only measured values of global POA irradiance (GPOA) are recorded on site. There is thus a need for a model to divide GPOA into its direct (IPOA) and diffuse components (DPOA). This paper compares and evaluates two models recently developed that perform such separation. The aim of this work is to show the advantages and disadvantages that these two models offer and how they differ from each other. In order to compare and evaluate them, two different POA data sets were used. The first data set is generated using SolarGIS satellite-based data for 16 different locations across Germany. The second data set contains on-site measured DPOA and GPOA data from a PV power plant located in south-west Germany. Results from both models show good matching with satellite-based data from the 16 different locations.
Author(s)
Guzman Razo, Dorian Esteban
Fraunhofer-Institut für Solare Energiesysteme ISE
Killinger, Sven
Fraunhofer-Institut für Solare Energiesysteme ISE
Müller, Björn
Fraunhofer-Institut für Solare Energiesysteme ISE
Wittwer, Christof
Fraunhofer-Institut für Solare Energiesysteme ISE
Hauptwerk
36th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2019
Project(s)
ALPRO
Funder
Bundesministerium für Wirtschaft und Energie BMWi (Deutschland)
Konferenz
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) 2019
DOI
10.4229/EUPVSEC20192019-5CV.3.1
File(s)
N-565482.pdf (749.45 KB)
Language
English
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Fraunhofer-Institut für Solare Energiesysteme ISE
Tags
  • Photovoltaik

  • Photovoltaische Modul...

  • Leistungselektronik

  • Netze und Intelligent...

  • Photovoltaische Kraft...

  • intelligentes Netz

  • model

  • irradiance

  • system

  • measurement

  • irradiance separation...

  • decomposition model

  • PV system

  • irradiance outdoor me...

  • plants of array

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